use git_odb::FindExt; use crate::Tree; /// Traversalimpl<'repo> Tree<'repo> {    /// Obtain a platform for initiating a variety of traversals.    pub fn traverse(&self) -> Platform<'_, 'repo> {        Platform {            root: self,            breadthfirst: BreadthFirstPresets { root: self },        }    }} /// An intermediate object to start traversing the parent tree from.pub struct Platform<'a, 'repo> {    root: &'a Tree<'repo>,    /// Provides easy access to presets for common breadth-first traversal.    pub breadthfirst: BreadthFirstPresets<'a, 'repo>,} /// Presets for common choices in breadth-first traversal.#[derive(Copy, Clone)]pub struct BreadthFirstPresets<'a, 'repo> {    root: &'a Tree<'repo>,} impl<'a, 'repo> BreadthFirstPresets<'a, 'repo> {    /// Returns all entries and their file paths, recursively, as reachable from this tree.    pub fn files(&self) -> Result<Vec<git_traverse::tree::recorder::Entry>, git_traverse::tree::breadthfirst::Error> {        let mut recorder = git_traverse::tree::Recorder::default();        Platform {            root: self.root,            breadthfirst: *self,        }        .breadthfirst(&mut recorder)?;        Ok(recorder.records)    }} impl<'a, 'repo> Platform<'a, 'repo> {    /// Start a breadth-first, recursive traversal using `delegate`, for which a [`Recorder`][git_traverse::tree::Recorder] can be used to get started.    ///    /// # Note    ///    /// - Results are returned in sort order according to tree-entry sorting rules, one level at a time.    /// - for obtaining the direct children of the tree, use [.iter()][crate::Tree::iter()] instead.    pub fn breadthfirst<V>(&self, delegate: &mut V) -> Result<(), git_traverse::tree::breadthfirst::Error>    where        V: git_traverse::tree::Visit,    {        let root = git_object::TreeRefIter::from_bytes(&self.root.data);        let state = git_traverse::tree::breadthfirst::State::default();        git_traverse::tree::breadthfirst(            root,            state,            |oid, buf| self.root.repo.objects.find_tree_iter(oid, buf).ok(),            delegate,        )    }}